Million-Century Ice Prison (DUNE-EN066) [Duelist Nexus]

During the Main Phase, if a monster(s) you control leaves the field by an opponent's monster effect, except by being destroyed: Activate 1 of these effects;
<br>• End the Main Phase.
<br>• Skip Main Phase 1 of your opponent's next turn.
<br>You can only activate 1 "Million-Century Ice Prison" per turn.